Class XII · Biology practice
Microbes in Human Welfare PYQs
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12 questions in this collection · Page 1 of 2
Microbes In Human Welfare
Identify the microorganism which is responsible for
the production of an immunosuppressive molecule
cyclosporin A:
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Microbes In Human Welfare
Match List-I with List-II.
| List-I |
List-II |
| (A)Aspergillus niger |
(I)Acetic Acid |
| (B)Acetobacter aceti |
(II)Lactic Acid |
| (C)Clostridium butylicum |
(III)Citric Acid |
| (D)Lactobacillus |
(IV)Butyric Acid |
Choose the correct answer from the options given below:
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Microbes In Human Welfare
Cyclosporin A, used as immuno suppression agent, is
produced from:
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Microbes In Human Welfare
Match the following columns and select the correct
option:
| Column-I |
Column-II |
| (A)Dragonflies |
(I)Biocontrol agents of several plant
pathogens |
| (B)Bacillus thuringiensis |
(II)Get rid of Aphids and mosquitoes |
| (C)Glomus |
(III)Narrow spectrum insecticidal applications |
| (D)Baculoviruses |
(IV)Biocontrol agents of lepidopteran
plant pests |
|
(V)Absorb phosphorus from soil |
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Microbes In Human Welfare
For the commercial and industrial production of Citric Acid, which of the following microbes is used?
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Microbes In Human Welfare
Match the following organisms with the products
they produce:
| (A)Lactobacillus |
(I)Cheese |
| (B)Saccharomyces cerevisiae |
(II)Curd |
| (C)Aspergillus niger |
(III)Citric Acid |
| (D)Acetobacter aceti |
(IV)Bread |
|
(V)Acetic Acid |
Select the correct option.
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Microbes In Human Welfare
Which of the following can be used as a biocontrol
agent in the treatment of plant disease?
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Microbes In Human Welfare
Select the correct group of biocontrol agents.
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Microbes In Human Welfare
Match List I with List II:
|
List-I |
|
List-II |
| A. |
Clostridium butylicum |
I. |
Ethanol |
| B. |
Saccharomyces cerevisiae |
II. |
Streptokinase |
| C. |
Trichoderma polysporum |
III. |
Butyric acid |
| D. |
Streptococcus sp. |
IV. |
Cyclosporin-A |
Choose the correct answer form the options given
below:
Explanation: NCERT Page No. 183 (Topic-10.2.3 Chemicals, Enzymes and other Bioactive Molecules)
Microbes In Human Welfare
Which of the following is used as a clot buster?
Streptokinase is used as a clot buster to remove blood clots from the blood vessels of patients who have suffered myocardial infarction.
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